It’s all perfectly easy to manage by simply knowing how to play and being able to effectively assess your options. Just research the downed skills a little, and you’ll be able to understand better what they’re up to and how to shut it down.
i can see where you are coming from, but there are some tremendous balancing issues, when some classes can near instantly interrubt you after going down (Warrior Stun Rock/ Guardian knockback bubble/necro fear) or “blink away” (rogue/mesmer) and some other classes have to wait nearly 12secs to interrupt/move away (elementalist/engineer). Either remove cc in down state completly, treat every class equally with interrupts or remove downed state all together in pvp.